overplay your hand
US /ˌoʊvərˈpleɪ jʊər hænd/
UK /ˌoʊvərˈpleɪ jʊər hænd/

1.
무리수를 두다, 과신하다
to spoil a strong position by overdoing something or being too confident
:
•
He tried to demand too much and ended up overplaying his hand.
그는 너무 많은 것을 요구하려다가 결국 무리수를 뒀다.
•
The politician might overplay his hand by making such extreme promises.
그 정치인은 그런 극단적인 약속을 함으로써 무리수를 둘 수도 있다.